Exclude Related posts from Jetpack

Hi,
I have 4 posts I want to exclude and I’ve added this code to my Edit CSS tool. However nothing seems to change.

Can you help, website is chaosandtravvel.com

Thanks
Oscar

Just tried changing the number of posts shown and the code for that also doesn’t seem to work on my site?

Every time I enter it in the Edit CSS section it deletes part of the code??

function jetpackme_exclude_related_post( $exclude_post_ids, $post_id ) {
    // $post_id is the post we are currently getting related posts for
    $exclude_post_ids[] = 2097; // Exclude post_id 2097
    $exclude_post_ids[] = 2265; // Also exclude post_id 2265
	 $exclude_post_ids[] = 2254; // Also exclude post_id 2254
	 $exclude_post_ids[] = 2045; // Also exclude post_id 2045
    return $exclude_post_ids;
}
add_filter( 'jetpack_relatedposts_filter_exclude_post_ids', 'jetpackme_exclude_related_post', 20, 2 );

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